Nozzle construction



Oct. 20, 1942. W. F. DRAY 4 2,299,710

NQzzLE CONSTRUCTION Filed July 2e, 1940 '2' shgis-sheet 1 l nfl/14 lINVENTOR /MLMO/f BY @Hyg ATTORNEY ct. 20, 1942. w; F. Dr-:AY` yv2,299,710

NOZZLE CONSTRUCATION Filed July 2e; 1940 2 sheets-sheet 2 ATTORNEY 56 ymvENroR Patented Oct. 20, 1942 UNITED STATES PATENT ortica 2,299,710NOZZLE CONSTRUCTION William Francis Dray, Providence, R. I., assigner toDavol Rubber Rhode Island Company,

a corporation of Application July 26, 1940, Serial No. 347,692

1 Claim.

pended thereto.

In the drawings:

Fig. 1 is a side elevation of a nozzle embodying my invention;

Fig, 2 is a section taken along line 2 2 on Fig. 1;

Fig. 3 is a front in Fig. l;

Fig. 4 is a section taken along line 4-4 on Fig. 2;

Fig. 5 is a sectional View of the nozzle within the mold;

Fig. 6 is a of one of the Fig. 7 is a ing core;

Fig. 8 is a top plan view of one half of the mold;

Fig. 9 is a similar view with the cores in place; and

Fig. l0 is a section taken along line IU-lll on Fig. 9.

Hard rubber nozzles for syringes are well known to the art. Thesenozzles may be straight or curved and provision may be made for varioustypes of sprays. plied to a novel type of elevation of the nozzle shownside elevation, partly molding cores; side elevation of the other moldanopen ended annular in section,

counter bore construction and 55 (Cl. 12S-239) comprises an innerannular head with the main body portionof 24 integral nozzle and andintersecting at right angles. spaced from the central head portion 24 isan outer integral guard portion 28 which surrounds the and extendsaxially from the main body portion shown in Fig. l. The spray outlets 3Uare preferably oval in shape and the sides thereof taper outwardly aslat 3| in Fig. 2. The portion of channels are pinched and stopped up,around 24 and out through the front of the nozzle.

guard portion. end of the cavity are ing transverse groove portions 40and 4l at one end and 42 and 43 at the other end. The porvtions 4D and43 are semi-circular grooves adapted to form annular groove portionswhen the die is closed and the portions 4I and 42 are merely rectangulartransverse grooves for a purpose hereinafter to be described.Surrounding the main cavity portion of the die are grooves 44 and 45slightly spaced from the main cavity portion and separated therefrom bya narrow ledge portion 46.

The internal portions of the nozzle, including the channels and openingsand the head 24, are formed by the use of cores 41 and 48 illustrated inFigs. 6 and '7. The core 41 comprises a main body portion 49 having atransverse annular collar 50 adapted to set into the groove 43 of themold. This collar portion 59 centers the core 41 in the mold. Theportion 49 is provided with an integral end portion 5I tion and having anarrow hollow tubular end section 52 adapted to mold the head 24 of thenozzle. The core 41 is set into the mold 32 as shown in Fig. 9.

The core portion 43, illustrated in Fig. '7, comprises a main bodyportion 53 and a transverse annular collar 54 adapted to center the coreby setting into the groove 46. The main body portion 53 is provided withan integral elongated narrow annular portion 55 which in turn isprovided with a narrow annular head 55 which extends into the portion 52on the core 41 when the cores are assembled in the mold. The portion 55forms the channel 23 in the nozzle and the head 55 forms the channelportion 25 in the head 24 of the nozzle. When the cores are set into themold as shown in Fig. with rubber compound or other suitable materialand the nozzle is molded as shown in Fig. 5. The nozzle may then be setby vulcanizing, or by any other suitable means.

Y In compressing the two mold portions the exof annular cross sec- 9 themold is filled cess rubber will spread outwardly into grooves 44 and 45as shown in Fig. 10, the ledge 4B aoting as a knife edge and trimmingthe nozzle in the mold.

'The'v aforementioned mold is simple in construction and provides asimple and economical means of molding the nozzle 20 in a singleoperation in one integral piece. Subsequent to the molding operation,the openings 26 and 21 are drilled through the head 24, the spacebetween the head and guard may be reamed, and the nozzie may be suitablyground and polished.

In the construction shown, the discharge openings 26 and 21 are guardedfrom being stopped up, and, the molding die and method of molding aresuitable for molding different shapes, sizes and designs of nozzles withslight changes in the mold cavity and core insert.

While I have described a specific embodiment of my invention and aspecic mold and method of molding the same, it is obvious that changesin the size, shape and arrangement of the parts and in the mold andmolding method may be made to suit the requirements -for diilerentnozzle designs withous departing from the spirit and the scope of theinvention as dened in the appended claim.

I claim:

An integral one-piece syringe nozzle comprising a generally cylindricalbody having a longitudinal bore, the distal end of the body terminatingin a nozzle end having an open ended annular counterbore with openingsin the Walls thereof, and a cylindrical head in said nozzle endextending inwardly from the body and positioned in said counterbore inalignment therewith and spaced from the walls thereof to provide acontinuation of the longitudinal bore, said head having spray openingsin its walls and a closed terminal end.

WILLIAM FRANCIS DRAY.

